Lake Guerlédan Reservoir

Large artificial lake in Brittany, created by dam

In central Brittany, Lac de Guerlédan fills a 1930s hydro valley; visitors hire boats, follow trails along the drowned valley and cycle the lake road, passing exposed stone bridges and wooded slopes.

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Lake Guerlédan at a Glance#

Address: Lac de Guerlédan, Brittany, France (near Mûr-de-Bretagne)

Website: https://www.tourisme-morbihan.bzh/

Hours: Daily sunrise-sunset (park areas)

Admission: Free to visit the lake perimeter; water activities may carry fees

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How to Get to Lake Guerlédan#

Drive from Rennes or Pontivy via D roads toward Mûr-de-Bretagne; the lake is signposted and has several parking areas and trailheads.

Tips for Visiting Lake Guerlédan#

  • Cycle the full loop to appreciate the variety of viewpoints along the dam
  • Sample local crepes or cider in nearby market towns-Brittany is proud of both
  • Bring a windproof jacket-the lake is exposed in places and can be breezy

Best Time to Visit Lake Guerlédan#

Summer is best for boat hires and activities, while spring and autumn offer quieter visiting conditions.

Summer (Jun-Aug)
June-August · 15-25°C
Warm weather, boat hire available, most services open
Spring (Apr-May)
April-May · 8-18°C
Fewer crowds and flowering hedgerows
Autumn (Sep-Oct)
September-October · 8-18°C
Crisp air and colorful foliage; quieter after summer

Weather & Climate near Lake Guerlédan#

Climate

Lake Guerlédan's climate is classified as Oceanic - Oceanic climate with mild summers (peaking in August) and cold winters (coldest in January). Temperatures range from 3°C to 21°C. Moderate rainfall (978 mm/year).

Air Quality: AQI 33 Good
Temperature & Rainfall
Temperature Range
21°
Warmest Month
3°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January - 4° - 8° 3° 113 mm - - 4.2 m/s - -
February - 3° - 9° 3° 90 mm - - 4.2 m/s - -
March - 5° - 11° 5° 81 mm - - 4.2 m/s - -
April - 6° - 13° 7° 65 mm - - 4.1 m/s - -
May - 9° - 16° 12° 70 mm - - 3.9 m/s - -
June - 11° - 19° 15° 54 mm - - 3.6 m/s - -
July - 13° - 21° 17° 47 mm - - 3.5 m/s - -
August - 13° - 21° 17° 54 mm - - 3.3 m/s - -
September - 11° - 19° 15° 75 mm - - 3.3 m/s - -
October - 9° - 15° 12° 97 mm - - 3.4 m/s - -
November - 6° - 12° 7° 119 mm - - 3.5 m/s - -
December - 4° - 9° 4° 113 mm - - 4.1 m/s - -